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GEO5

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Modulus of subsoil reaction according to CSN 73 1004

The modulus of subsoil reaction for cohesive soil assumes the form:

where: Edef - deformation modulus of soil
d - pile diameter

For cohesionless soils it is provided by:

where: nh - modulus of horizontal compressibility
d - pile diameter
z depth of a given section from finished grade
Soil nh  [MN/m3]
Relative density ID 0,33 0,50 0,90
Dry sand and gravel
Wet sand and gravel
1,5
2,5
7,0
4,5
18,0
11,0

Possible values of modulus nh  for cohesionless soils




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